Optimum Gray combines maximum rigidity and maximum torque load and vibration resistance with extreme temperature -65 to 700 deg F intermittent, expanding uses and applications. Designed for max performance applications common in import and late model engines and component upgrades. It is sensor safe, low odor and non-corrosive. The maximum rigidity and maximum torque load feature combination joined with outstanding resistance to oils, coolant and shop fluids make Optimum Gray one of the most versatile gasket makers available.